849432431 has 4 divisors (see below), whose sum is σ = 865459512. Its totient is φ = 833405352.

The previous prime is 849432407. The next prime is 849432439. The reversal of 849432431 is 134234948.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 849432431 - 2¹⁴ = 849416047 is a prime.

It is a super-2 number, since 2×849432431² = 1443070909669139522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849432439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8013461 + ... + 8013566.

It is an arithmetic number, because the mean of its divisors is an integer number (216364878).

Almost surely, 2^849432431 is an apocalyptic number.

849432431 is a deficient number, since it is larger than the sum of its proper divisors (16027081).

849432431 is a wasteful number, since it uses less digits than its factorization.

849432431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16027080.

The product of its digits is 82944, while the sum is 38.

The square root of 849432431 is about 29145.0241207655. The cubic root of 849432431 is about 947.0573509913.

The spelling of 849432431 in words is "eight hundred forty-nine million, four hundred thirty-two thousand, four hundred thirty-one".